Right-wing media are once again pinning stock market fluctuations on President Obama, specifically his jobs speech last night.
Here's Drudge's take:

And here's Fox Nation:

Fox has made a habit of crediting Obama's words with downward market fluctuations.
Incidentally, both the articles Drudge and Fox Nation link to linked the market sell-off to turmoil in European markets and uncertainty about the health of Greece's economy.